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Deformation behavior of 42CrMo4 over a wide range of temperatures and strain rates in Split-Hopkinson pressure bar tests

Kimm, J.S. and Bergmann, J.A. and Wöste, F. and Pöhl, F. and Wiederkehr, P. and Theisen, W.

MATERIALS SCIENCE AND ENGINEERING A
Volume: 826 Pages:
DOI: 10.1016/j.msea.2021.141953
Published: 2021

Abstract
In this research, Split-Hopkinson pressure bar tests were performed on samples made from the quenched and tempered steel 42CrMo4 in four different heat-treatment conditions. These samples were subjected to four different pressures and five different temperatures while deforming the samples at strain rates in the range of 103 s−1. Stress-strain curves and the strain rate were computed from the measured signals. The polished cross-sections of the samples were analyzed before and after testing by means of SEM, EBSD, nanoindentation, and microhardness testing. A variety of deformation characteristics were identified and correlated with the pre-test and post-test microstructure. This work focusses on the influence of the microstructure on deformation and provides a detailed understanding on the deformation of the 42CrMo4 steel over a wide range of parameter values. © 2021 Elsevier B.V.

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